Flame retardant additive for a low smoke, zero halogen compound

Patent metadata

Field	Value
Publication number	US-10759922-B2
Application number	US-201816193634-A
Country	US
Kind code	B2
Filing date	Nov 16, 2018
Priority date	May 25, 2016
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A low smoke, zero halogen (LSZH) polymer composition is provided. The LSZH polymer composition includes a polymer resin, and a flame retardant package dispersed within the polymer resin. Less than 25% by weight of the polymer composition is the flame retardant package. The flame retardant package includes an acid source, a carbon source, and an LSZH additive. The LSZH additive includes a polyoxometalate ionic liquid and a synergist carrier. The LSZH polymer composition has a limiting oxygen index of greater than 31%. The LSZH polymer compound is suitable for use in electrical or tele-communication cables.

First claim

What is claimed is:

1. A low smoke, zero halogen (LSZH) polymer composition, comprising:
a polymer resin; and
a flame retardant package dispersed within the polymer resin, wherein the flame retardant package comprises:
an acid source;
a carbon source; and
an LSZH additive, comprising:
a polyoxometalate ionic liquid; and
a synergist carrier comprising a zeolite.

2. The LSZH polymer composition of claim 1 , wherein the polyoxometalate ionic liquid is formed from an ionic liquid selected from the group consisting of 1-ethyl-3-methyl-imidazolium ethyl sulfate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-hexyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, scandium(III) trifluoromethanesulfonate, praseodymium (III) trifluoromethanesulfonate, 1,3-dialkyl-1,2,3-triazolium hexafluorophosphate, 1,3-dialkyl-1,2,3-triazolium bis(trifluoromethanesulfonyl)imide, 1,2,4-trimethylpyrazolium methylsulfate, and combinations thereof.

3. The LSZH polymer composition of claim 1 , wherein the polyoxometalate ionic liquid is formed from a polyoxometalate selected from the group consisting of [PW 12 O 40 ] 3− , [PMo 12 O 40 ] 3− , [SiW 12 O 40 ] 4− , [SiMo 12 O 40 ] 4− , [BW 12 O 40 ] 3− , [BMo 12 O 40 ] 3− , [AsW 12 O 40 ] 5− , [AsMo 12 O 40 ] 5− , [GeW 12 O 40 ] 4− , [GeMo 12 O 40 ] 4− , [PMo 9 V 3 O 40 ] 5− , [PMo 10 V 2 O 40 ] 5− , [PMo 11 VO 40 ] 4− , [P 2 W 18 O 62 ] 6− , [P 2 Mo 18 O 62 ] 6− , [As 2 W 18 O 62 ] 6− , [As 2 Mo 18 O 62 ] 6− , [W 6 O 19 ] 2− , [Mo 6 O 19 ] 2− , [V 6 O 19 ] 8− , [Nb 6 O 19 ] 8− , and combinations thereof.

4. The LSZH polymer composition of claim 1 , wherein the synergist carrier further comprises at least one of a bentonite or zinc.

5. The LSZH polymer composition of claim 1 , wherein the zeolite comprises zeolite 4A.

6. The LSZH polymer composition of claim 1 , wherein the LSZH additive comprises between 0.5 and 5%, by weight, of the polymer composition dispersed within the polymer resin.

7. The LSZH polymer composition of claim 1 , wherein flame retardant package comprises between 10% and 30%, by weight, of the polymer composition dispersed within the polymer resin.

8. The LSZH polymer composition of claim 1 , wherein a weight ratio of the acid source to the carbon source is at least 2:1.

9. The LSZH polymer composition of claim 1 , wherein the acid source is ammonium polyphosphate.

10. The LSZH polymer composition of claim 1 , wherein the carbon source is selected from the group consisting of pentaerythritol and its derivatives, phenol formaldehyde resins, polyamides, sorbitol, starches, cyclodextrins, and combinations thereof.

11. The LSZH polymer composition of claim 1 , wherein the polymer resin is selected from the group consisting of ethylene-vinyl acetate copolymers, ethylene-acrylate copolymers, ethylene homopolymers, linear low density polyethylene, very low density polyethylene, polyolefin elastomer copolymer, propylene homopolymer, polyethylene-polypropylene copolymer, butene- and octene branched copolymers, maleic anhydride-grafted versions of the polymers listed herein, and combinations thereof.

12. The LSZH polymer composition of claim 1 , wherein flame retardant package further comprises a spumific compound.

13. The LSZH polymer composition of claim 12 , wherein the spumific compound includes melamine.

14. The LSZH polymer composition of claim 1 , wherein less than 25% by weight of the polymer composition is the flame retardant package and wherein the LSZH polymer composition has a limiting oxygen index of greater than 31%.

15. The LSZH polymer composition of claim 1 , wherein the flame retardant package further comprises at least one of aluminum trihydroxide or magnesium dihydroxide.

Assignees

• Corning Optical Communications LLC

Inventors

• Jiang Dayue
• Vasilakos Kevin Andrew

Classifications

• C08K5/0066 Primary

  Flame-proofing or flame-retarding additives · CPC title

• C08K5/0091

  Complexes with metal-heteroatom-bonds · CPC title

• C08K5/3445

  Five-membered rings · CPC title

• C08K5/34922

  Melamine; Derivatives thereof · CPC title

• H01B7/295

  using material resistant to flame · CPC title